In a puzzling twist, evidence for corotating circumstellar clouds in the Bp star HD 37776 was recently published by [1]}. Although its photometric variability has traditionally been explained by chemical spots similar to those of \(\alpha ^2 \textrm { CVn }\)[2]}, newly discovered complexity in its TESS lightcurve requires a contribution from corotating clouds in a higher order, multipolar magnetic field. HD 37776 is not an isolated case, either. We searched the TESS archives for other Ap stars with similar qualitative behavior and identified several more examples (e.g. HD 95974 and HD 123350; [3]}, [4]}).
The complex photometric variability of these stars is very similar to the behavior observed in HD 37776, suggesting that the class of \(\alpha ^2 \textrm { CVn }\) stars may also harbor magnetospheric clouds like their hotter Bp counterparts.
